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NAVY RESTRICTED LINE OFFICER is a Line Officer who is not eligible for Command-At-Sea, and restricted as to type of duty assignments.
line impedance - the impedance of a telecommunication line.
It is a function of the resistance, inductance, conductance, and capacitance of the line, and the frequency of the signal.
line security - any of several methods for securing a line, e.g., by line supervision in which a transmission line is determined to be functional through constant monitoring of power passing through it.
RestrictedLineOfficers in the United States Navy and Navy Reserve are those who are not staff officers (e.g.
Naval Intelligence Officers have a wide variety of technical and non-technical academic backgrounds, including political science, modern history, physical and natural sciences, and the liberal arts.
Cryptology: There are over 700 Navy Cryptology officers, who perform Naval cryptology and related functions as directed by the Chief of Naval Operations and National Signals Intelligence tasks assigned by the Director, National Security Agency.